| 1 | // Copyright Louis Dionne 2013-2022 |
|---|---|
| 2 | // Distributed under the Boost Software License, Version 1.0. |
| 3 | // (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt) |
| 4 | |
| 5 | #include <boost/hana/assert.hpp> |
| 6 | #include <boost/hana/config.hpp> |
| 7 | #include <boost/hana/functional/flip.hpp> |
| 8 | namespace hana = boost::hana; |
| 9 | |
| 10 | |
| 11 | BOOST_HANA_CONSTEXPR_LAMBDA auto minus = [](int x, int y, int z = 0) { |
| 12 | return x - y - z; |
| 13 | }; |
| 14 | |
| 15 | int main() { |
| 16 | BOOST_HANA_CONSTEXPR_CHECK(minus(3, 0) == 3 - 0); |
| 17 | BOOST_HANA_CONSTEXPR_CHECK(hana::flip(minus)(3, 0) == 0 - 3); |
| 18 | |
| 19 | BOOST_HANA_CONSTEXPR_CHECK(minus(3, 0, 1) == 3 - 0 - 1); |
| 20 | BOOST_HANA_CONSTEXPR_CHECK(hana::flip(minus)(3, 0, 1) == 0 - 3 - 1); |
| 21 | } |
| 22 |